When using Brave, my H-P Spectre screen goes off and on randomly and frequently. NOT with other browsers.
Try . . . Disable Hardware Acceleration
In a Brave Browser > New Window, go to:
Disable hardware acceleration, clear browser data; if you have nvidia, check if driver is up to date, and set it to Auto-select. Restart browser.
If not working, open Brave, than open a private window (CTRL+SHIFT+N) to see if issue persists.
Thanks CL. This appears to have corrected the issue.